#include <iostream>
using namespace std;

class Circe{
	private:
		double R;
		double C;
		double S;
	public:
		Circe(int r=0){
			this->R=r;
			this->S=3.14*r*r;
			this->C=2*3.14*r;
		}
		Circe(Circe &circle){
			this->R=circle.R;
			this->C=circle.C;
			this->S=circle.S;
		}
		void Out();
};
int main()
{
	double r;
	cin>>r;
	Circe Y(r);
	Y.Out();
	return 0;
}
void Circe::Out()
{
	cout<<this->R<<' '<<this->C<<' '<<this->S;
}
